A string is a valid parentheses string (denoted VPS) if it meets one of the following: We can similarly define the nesting depth&n…
My memo and playground
My memo and playground
A string is a valid parentheses string (denoted VPS) if it meets one of the following: We can similarly define the nesting depth&n…
Given an m x n grid of characters board and a string word, return true if word exists in the grid. The wo…
There are n children standing in a line. Each child is assigned a rating value given in the integer array ratings. You are giving candi…
There are n cities connected by some number of flights. You are given an array flights where flights[i] = [fromi, toi, pricei…
You are a hiker preparing for an upcoming hike. You are given heights, a 2D array of size rows x columns, where heights[row][col] …
You are given a network of n nodes, labeled from 1 to n. You are also given times, a list of travel times as directed ed…
Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of…
A linked list of length n is given such that each node contains an additional random pointer, which could point to any node in the list, or&…
According to Wikipedia’s article: “The Game of Life, also known simply as Life, is a cellular automaton devised by the Brit…
You are given the heads of two sorted linked lists list1 and list2. Merge the two lists into one sorted list. The list should…